Improvement in nut-fastenebs



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JAMES CHRISTY, 0F PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 76,995, elated April 21, 1868; autecZa-teel April .14, 1868.

IMPRV'EMENT IN NUT-FASTENERS.

@its tlgitnle referat tu it time Estima minut-'nxt maling gaat rf the sami.

T0 ALL WHOM IT MAY CONCERN.:

Be it known that I, JAMES CHRISTY, of Philadelphia, Pennsylvania, Ahave invented a Nut-Bolt and Set. Screw Retainer; and I do hereby declare the following to be a full, clear, and exact description oi' the same.

My invention consists of a wire, bent, secured, and arranged in respect to a nut, or the head of a bolt or screw, so as to eicctually prevent the same from working loose,and yet permit them to be turned by 'au ordi nary wrench.A

In order to enable others to make and apply my invention, I will -now proceed to describeamode of constructing and using the same, reference being had to the accompanying drawing, which forms'a part ot' this specification, and in which- Figure 1 is a front view,

Figure 2 an edge view of my nut-bolt and'set-screw retainer, and

Figure 3 a modification of my invention.

A represents the nut of a bolt, and the line B indicates the face of the object against which the nut or 4its washer abears. The retainer D is composed of wire, bentl to the shape, or approximating to the shape, (seen in g.`1,) so as to form two legsor arms d and d', at thejunction, c, of which is an abrupt bend, forming ari elongated eye, through which passes a screw, f, into the object B. The outer ends of the two legs d and d are bent abruptly, the bent ends being inserted -into orifices in the object B, anclbeing secured to the latter, if deemed necessary, by a set-screw or rivet. y

The two arms of the retainer, thus constructed, are 'bent outwards in the middle, as seen inA fig. 2, and bear against opposite edges of the nut a, thereby preventing thelatter from working loose. I

Owing to the length of theretainer, there is elasticity suicient in the arms to permit the lat-ter to yield on turning the nut, and to recover their former positiowhen the Hat sides of the nut are in line, or thereabouts, with the arms. I

As the nut is turned, and the arms d'cl' are consequently moved apart from each other, the retainer will be contracted in length, a contraction permitted by the elongated eye formed at the-bend e, for the admission of the screw j'. v

Although I-havc referred to my invention as applied to the retention of a nut, A, it will be understood that it is equally well adapted to the retention ofthe head of a b olt or set-screw, and will be of especial use in A the construction of railway-cars, and such machines as are subjected to sudden and violent shocks and strains, which tend to loosen bolts, nuts, and screws. In the modification, illustrated in iig'. 3, the ends of the arms d are hinged to a staple, a', driven' into or otherwise secured to the 4object B. y

Without confining myself to'van'y specific' modeo'f securing the ends-of the retainer, I claim as my invention, and desire to secure by Letters Patent- I The wire, D, bent, secured, and applied' to a nut, orto a. bolt or screw-head, substantially as' and for the purpose described. g y

In testimony whereof, I have signed my name to' this specification in thepresence of .two subscribing witnesses.

` JAS. CHRISTY. Witnesses JOHN WHITE, C. B. Pawn. 

